Of course, this one is as sure as the sun going down, because every new Transformers film to date has brought with it a new fleet of shiny, sleek robots to do battle. It's almost impossible to count the sheer number of bots that Michael Bay could include, but there are a few standouts that have yet to make their way to the big screen. Take, for example, the hugely popular Dinobots, some of the coolest robots this side of Optimus Prime; relatively simple creatures who could nevertheless cause a world of hurt within this Universe, and would no doubt look amazing on-screen. And what about Astrotrain, who can not only transform into a train, but a space shuttle as well? And of course, there's the legendary villain, Unicron, who had such a profound presence in Transformers: The Movie, primarily because he was voiced so excellently by legendary thesp Orson Welles.